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Finding the Fourth Proportional to 159,520.55, 220,148.15 and 87,900.55

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Solution

The fourth proportional to 159,520.55, 220,148.15 and 87,900.55 is: 121,308.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,520.55 : 220,148.15 = 87,900.55 : x
  2. Step 2: Convert to fraction form
    159,520.55/220,148.15 = 87,900.55/x
  3. Step 3: Cross multiply
    159,520.55x = 220,148.15 × 87,900.55
  4. Step 4: Simplify right side
    159,520.55x = 19,351,142,476.61
  5. Step 5: Solve for x
    x = 19,351,142,476.61/159,520.55
  6. Step 6: Final answer
    x = 121,308.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.